Valve-guide puller



Nov. 23 1926. 1 1,608,407 s. L. MACIAS I VALVE GUIDE FULLER Filed June4, 1925 Patented Nov. 23, 1926.

PATENT .rricn.

STEPHEN L. MACIAS, OF POIVIONA, CALIFORNIA.

VALVE-GUIDE FULLER.

Application filed June 4, 1925. Serial No. 34,825.

This invention relates to valve stem guide pullers.

Practically all internal combustion engines are provided with valve stemguides which snugly fit within bores formed in the cylinder block. Theusual procedure for pulling a valve stem guide into place is by means ofan ordinary bolt which is extended through the valve stem guide with thehead of the bolt resting on a washer placed on the top of a cylinderblock and the valve stem guide pulled into, place by turuing the nut onthe. bolt. However, 1n instances when the valve stem is of smalldiameter, the threads on the bolt are often stripped, due to the tensionrequired to pull the valve stem guide into place.

The object of this invention is to provide a valve stem guide pullerwhich will etleo tively pull the valve stem guide into place without anydanger of stripping threads regardless of the diameter of the valvestem.

Another object of the invention is to provide a valve guide puller whichmay be quickly applied, for pulling the valve guide into place, andquickly removed from the cylinder block after the guide has been pulledinto place.

These objects are accomplished by the disclosure herein set forth by thefollowing description of the accompanying drawings illustrating apractical embodiment of the invention, the novel features thereof beingpointed out in the appended claims, in which;

Figure 1 is a fragmentary section of a cylinder block of an internalcombustion engine, showing the improved valve stem guide puller as itappears in the first step in the operation of pulling the valve stemguide into place.

Fig. 2 is a view analogous to Fig. 1, showing the valve stem guidepuller as it appears when the valve stem guide has been pulled intoplace.

Fig. 3 is a perspective View of the valve stem guide puller.

Fig. i is a transverse section taken on line 4c4c of Fig. 1.

Fig. 5 is a perspective view showing the details of construction of thevalve stem guide puller.

Referring by numerals to the accompanying drawings, designates acylinder block having a cylinder 11, and a piston 12 therein. Thecylinder block 10 is of conventional construction and has a port 13formed therein, adjacent the cylinder 11, which may be either an intakeor exhaust port.

A valve seat 1% is formed in the upper face 15 of the cylinder block anda bore 16 in alinelnent with the valve seat 1 1 is also formed in thecylinder block, which is adapted to receive a valve stem guidedesignated at 17 1, The valve stem guide 17 is ofconventional"construction and has an internal bore 18 through which thevalve stem of the poppet valve extends, and is provided with a flange 19projecting from the body portion 20.

The valve stem guide puller is generally designated at 21, and consistsof a cylinder or sleeve 22, adapted to rest on the upper face 15 of thecylinder block 10 and is provided with a slot 23 for a purpose laterreferred to.

A head generally designated at 24k, has a hub 25 which is adapted to fitwithin the bore of the cylinder 22 with the shoulder 26 resting on theupper edge of the cylinder An opening 27 is formed in the head 24:,through which extends a jack screw 28, having an internal bore 29 and aswedged head 30 in which is formed an opening 31 of smaller diameterthan the bore 29, thus forming a shoulder 32 upon which a head 33 of apulling rod 3% is adapted to engage.

A groove 35 is formed in the lower end of the pulling rod 341 and isadapted to receive a pair of segmental rings 36 clearly shown in Fig. 5,(which engage a shoulder 37 The segmental rings 36 when placed on therod 34k project beyond the face of the rod 34: and form an abutmentadapted to be engaged by a. shoulder 38 formed in a collar 39, having asleeve t0 adapted to tit over the rings 36.

A pin l-1extends radially from the swedged head 30 and projects into theslot 23 and is adapted to hold the screw 28 from rotation. A washer L2is mounted on the head 24: and a nut 43 is carried by the screw 28.

In operation the valve stem guide 17 is placed in the bore 16 of thecylinder block as shown in Fig. 1, and the valve stem guide pullerplaced on top of the cylinder block. The rod 34 will drop through thebore 10 in the valve stem guide when the rod and opening 18 are inalinement.

The screw 28 is adjusted by the nut 43 so that the rod 3% will projectbelow the end of the valve stem guide.

vented from moving downward 011 the rod 34- by the segmental rings 36.By turning the nut 43 the screw 28 will be raised, the action of whichwill bring the collar 39 into engagement with the lower end of the valvestem guide 17, and by further rotation 01" the nut 4:3, the valve steinguide 17 will be pulled into place as shown in Fig. 2, the screw 28being held against rotation by the pin ll engaging the sides of the slot23.

In instances when the valve stem guide fits very tightly within the borein the cylinder block, the cylinder 22 may have a tendency to move withthe nut 43 when it is turned, due to tension and frictional cont-act.This movement may be prevented by inserting a pin 'or bar, indicated ata l through openings in the upper end of the screw 28 and manually heldagainst rotation when the nut 43 is turned.

In order to remove the valve stem guide puller after the valve stemguide has been brought into place, the nut a3 is turned to the left,which will permit the rod to move downwardly. The collar 39 is raised,the segmental rings removed and the collar sl1pped oil the end of therod, which will permit the rod to be pulled upwardly through the bore inthe valve stem guide.

The rod 3% may be made in diflerent sizes to accommodate various sizesof valve stem guides and is adapted to be interchangeable in the jackscrew 28, the diameter of the rod being variable while the head 33remains the same for each rod.

The valve stem guide puller may beemployed for removing valve stemguides from the bores in the cylinder block of engines in which thevalve stem guides are moved into place by downward pressure, and inoperation the device is placed on top or the cyl-' inder block as abovedescribed and the valve against rotation, said pulling rod eoaeov stemguide pulled out by turning the nut 43.

It will be noted that my valve guide puller is shown as being utilizedfor inserting valve guides which are pulled into place in the bore 16from below. However, some of these guides are thrust into place fromabove and hence my puller may be utilized to dislodge or to removeguides of such character.

From the construction it will be seen that the valve stem guide pulleris of simple construction, may be quickly applied for use, willeffectively pull the valve steiirguide into place and may be quicklyremoved.

Various changes may be made withoutde parting from the spirit of theinvention as claimed.

hat is claimed is 1. A valve guide puller comprising-a cylinder, havinga slot formed in one side thereof, ahead resting on the top of saidcylinder, a screw having; an internal bore projecting through an openingformed in said head and having a shoulder formed in the lower endthereof, a rod having a head engaging said shoulder, a collar having anopening adapted to lit over the lower endot said rod, said rod having agroove, a pair of segmental rings adapted to be mounted in the groove,said collar having a shoulder adapted to engage said segmental rings, anot carried by said screw adapted to raise said rodand a pin carried bythe lower end of said screw adapted to engage; the sides of the slotformed in said cylinder.

2. A valve guide puller comprising a member adapted to rest on the topor" a cyl inder block, a head mounted on said member, a screw extendingthrough said head, a nut engaging saidscrew, a pulling rod carried bysaid screw, means for holding said screw having an annular groove in thelower end thereof, a pair of segmental rings adapted to lit withinsaidgroove and a collaradapted to es gage said segmentalrings. y i

In testimony whereof Ihave signed my name to this specification.

STEPHEN I): MAGIAS.

